Oblique Raman and polariton scattering in lithium lodate

Tuning of the LO and TO oblique Raman and the oblique polariton frequencies in the 769-848/cm spectral region in lithium iodate has been predicted and measured. Oblique scattering in LiIO3 is produced by coupling of A and E symmetry crystal modes. The resulting LO and TO frequencies lie between the frequencies of the contributing modes. The intensity of the scattered light observed indicates that construction of CW or quasi-CW stimulated oblique Raman and polariton oscillators are possible.